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8141132: JEP 254: Compact Strings

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Adopt a more space-efficient internal representation for strings.

Co-authored-by: Brent Christian <brent.christian@oracle.com>
Co-authored-by: Vivek Deshpande <vivek.r.deshpande@intel.com>
Co-authored-by: Charlie Hunt <charlie.hunt@oracle.com>
Co-authored-by: Vladimir Kozlov <vladimir.kozlov@oracle.com>
Co-authored-by: Roger Riggs <roger.riggs@oracle.com>
Co-authored-by: Xueming Shen <xueming.shen@oracle.com>
Co-authored-by: Aleksey Shipilev <aleksey.shipilev@oracle.com>
Co-authored-by: Sandhya Viswanathan <sandhya.viswanathan@intel.com>
Reviewed-by: alanb, bdelsart, coleenp, iklam, jiangli, jrose, kevinw, naoto, pliden, roland, smarks, twisti
This commit is contained in:
Tobias Hartmann 2015-11-03 09:41:03 +01:00
parent 4e24e2cc6c
commit 7af927f9c1
74 changed files with 4838 additions and 1683 deletions
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50
hotspot/src/cpu/x86/vm/assembler_x86.cpp
View file

@ -3036,6 +3036,35 @@ void Assembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
emit_int8(imm8);
}
void Assembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
NOT_LP64(assert(VM_Version::supports_sse2(), ""));
emit_simd_arith(0x75, dst, src, VEX_SIMD_66,
false, (VM_Version::supports_avx512dq() == false));
}
void Assembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
assert(UseAVX > 0, "some form of AVX must be enabled");
emit_vex_arith(0x75, dst, nds, src, VEX_SIMD_66, vector_len,
false, (VM_Version::supports_avx512dq() == false));
}
void Assembler::pmovmskb(Register dst, XMMRegister src) {
assert(VM_Version::supports_sse2(), "");
int encode = simd_prefix_and_encode(as_XMMRegister(dst->encoding()), xnoreg, src, VEX_SIMD_66, true, VEX_OPCODE_0F,
false, AVX_128bit, (VM_Version::supports_avx512dq() == false));
emit_int8((unsigned char)0xD7);
emit_int8((unsigned char)(0xC0 | encode));
}
void Assembler::vpmovmskb(Register dst, XMMRegister src) {
assert(VM_Version::supports_avx2(), "");
int vector_len = AVX_256bit;
int encode = vex_prefix_and_encode(as_XMMRegister(dst->encoding()), xnoreg, src, VEX_SIMD_66,
vector_len, VEX_OPCODE_0F, true, false);
emit_int8((unsigned char)0xD7);
emit_int8((unsigned char)(0xC0 | encode));
}
void Assembler::pextrd(Register dst, XMMRegister src, int imm8) {
assert(VM_Version::supports_sse4_1(), "");
int encode = simd_prefix_and_encode(as_XMMRegister(dst->encoding()), xnoreg, src, VEX_SIMD_66, /* no_mask_reg */ true,
@ -3108,6 +3137,17 @@ void Assembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
emit_int8((unsigned char)(0xC0 | encode));
}
void Assembler::vpmovzxbw(XMMRegister dst, Address src) {
assert(VM_Version::supports_avx(), "");
InstructionMark im(this);
bool vector256 = true;
assert(dst != xnoreg, "sanity");
int dst_enc = dst->encoding();
vex_prefix(src, 0, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F_38, false, vector256);
emit_int8(0x30);
emit_operand(dst, src);
}
// generic
void Assembler::pop(Register dst) {
int encode = prefix_and_encode(dst->encoding());
@ -5370,6 +5410,16 @@ void Assembler::vpbroadcastd(XMMRegister dst, XMMRegister src) {
emit_int8((unsigned char)(0xC0 | encode));
}
// duplicate 2-bytes integer data from src into 16 locations in dest
void Assembler::vpbroadcastw(XMMRegister dst, XMMRegister src) {
assert(VM_Version::supports_avx2(), "");
bool vector_len = AVX_256bit;
int encode = vex_prefix_and_encode(dst, xnoreg, src, VEX_SIMD_66,
vector_len, VEX_OPCODE_0F_38, false);
emit_int8(0x79);
emit_int8((unsigned char)(0xC0 | encode));
}
// duplicate 1-byte integer data from src into 16||32|64 locations in dest : requires AVX512BW and AVX512VL
void Assembler::evpbroadcastb(XMMRegister dst, XMMRegister src, int vector_len) {
_instruction_uses_vl = true;